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ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 2003,Vol.19>> Issue(11)>> 1054-1058     doi: 10.3866/PKU.WHXB20031114         中文摘要
Theoretical Studies of Near Edge X-rays Absorption Fine Structure for Cl Adsorbed on GaAs(111) Surface
Shen Shao-Lai;Tang Jing-Chang;Cao Song;Wang Lei
1Department of Physics, 2State Key Laboratory for Silicon Material Science, Zhejiang University, Hangzhou 310027
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The multiple scattering cluster (MSC) method has been employed to calculate the chlorine 1s near edge X-ray absorption fine structure (NEXAFS) of the Cl adsorbed on GaAs(111) surface. A series of specially designed clusters have been used to mimic the Cl/GaAs(111) geometry for finding the local geometrical structures of the system. The physical origin of the peaks in NEXAFS spectra has been revealed. MSC calculation shows that the Cl atom is adsorbed on the top site, the Cl-Ga bond length is (0.213±0.005) nm and the Ga-As bond length in surface layer is (0.235±0.005) nm. The comparison between above results and those of EXAFS experiment and the Slab model calculation has been made and discussed.

Keywords: Near edge X-ray absorption fine structure (NEXAFS)   Cl/GaAs(111) surface   Multiple-scattering cluster method(MSC)  
Received: 2003-04-15 Accepted: 2003-07-14 Publication Date (Web): 2003-11-15
Corresponding Authors: Shen Shao-Lai Email: ascoaco@zju.edu.cn


Cite this article: Shen Shao-Lai;Tang Jing-Chang;Cao Song;Wang Lei. Theoretical Studies of Near Edge X-rays Absorption Fine Structure for Cl Adsorbed on GaAs(111) Surface[J]. Acta Phys. -Chim. Sin., 2003,19 (11): 1054-1058.    doi: 10.3866/PKU.WHXB20031114
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